Why is my 1985 Rx7 dying when you put it in neutral?

Your 1985 RX-7 may be dying when put in neutral due to several reasons, such as a vacuum leak affecting the air-fuel mixture, an issue with the idle air control valve, or a malfunctioning fuel pump. Additionally, if the battery or alternator is weak, the engine might not be receiving enough power to maintain idle. It's also worth checking the condition of the spark plugs and ignition system, as these can impact engine performance. A thorough diagnostic can help identify the specific cause.